Jansjo diffusion, sharpness tips
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Jansjo diffusion, sharpness tips
For you folks using the Jansjo constant lighting work lamps, what sort of set up and diffusion are you using? So far, I haven't had much luck with them. I think I was diffusing too much, then too long of exposures and then the result too soft. Thanks.
Hi there ctron,
I use both Jansjo and fibre optic light. I have had great success with ping pong balls. Drill a hole in them and put it on the light.
Beware that there are different qualities in the balls. I´ve tested cheap ones vs Stiga *** Champion. There is one full f-stop difference. The walls in the cheap balls are thicker.
I´ve read about using those balls here on the forum, so it´s not my idea.
Hope this helps?
I use both Jansjo and fibre optic light. I have had great success with ping pong balls. Drill a hole in them and put it on the light.
Beware that there are different qualities in the balls. I´ve tested cheap ones vs Stiga *** Champion. There is one full f-stop difference. The walls in the cheap balls are thicker.
I´ve read about using those balls here on the forum, so it´s not my idea.
Hope this helps?
I second the ping-pong ball suggestion. I used them for speedlight diffusion and they worked wonders-
I purchased these ones: http://a.co/ceb28HK
I needed a larger area to move my subject around so I'm using 3d printed half-spheres that slip/lock onto my objectives (think half or a Poke'ball). The ping-pong balls worked right out of the gate; I'm still working out the perfect thickness and such for my 3d printed ones.
I purchased these ones: http://a.co/ceb28HK
I needed a larger area to move my subject around so I'm using 3d printed half-spheres that slip/lock onto my objectives (think half or a Poke'ball). The ping-pong balls worked right out of the gate; I'm still working out the perfect thickness and such for my 3d printed ones.
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I do 2 levels of diffusion with Jansjos:
- first level is to remove the lens from the Jansjo and replace it with a disk of vellum. This is sufficient to eliminate the "pinpoint" nature of the LED.
- second level is to place another sheet of vellum an appropriate distance away from the subject (coins in my case). I then move the diffused Jansjos (usually 2) to shine onto the vellum sheet, moving them closer or farther from the sheet to adjust the amount of diffusion.
- first level is to remove the lens from the Jansjo and replace it with a disk of vellum. This is sufficient to eliminate the "pinpoint" nature of the LED.
- second level is to place another sheet of vellum an appropriate distance away from the subject (coins in my case). I then move the diffused Jansjos (usually 2) to shine onto the vellum sheet, moving them closer or farther from the sheet to adjust the amount of diffusion.
Just a plastic cup works awesome
2017-Set-12 by Can Tunçer, on Flickr
2017-Set-13 by Can Tunçer, on Flickr
2017-Set-12 by Can Tunçer, on Flickr
2017-Set-13 by Can Tunçer, on Flickr
Ping pong balls here too. For double diffusion, I got a couple of Godox AD-S17 dome diffusers from China and hacked them to surround said ping pong ball. They're 12cm diameter and can be lit from the outside, or bounce light inside them for a bit more brightness. Use one on it's own like a large ping pong ball for bigger specimens. I find them very useful and they block surprisingly little light given their thickness.
http://www.ebay.co.uk/itm/Godox-AD-S17- ... 2183245837
http://www.ebay.co.uk/itm/Godox-AD-S17- ... 2183245837
When I use my copy stand I like to use some food containers from IKEA and sometimes lamp shades also from IKEA.
http://www.ikea.com/gb/en/products/cook ... -50149560/
http://www.ikea.com/gb/en/products/ligh ... -00328352/
The containers works with leds, the lamp shades are better with flash.
To soften the flash light for the picture of the Oyster: http://www.photomacrography.net/forum/v ... 518#218518 I used this box from IKEA:
http://www.ikea.com/gb/en/products/smal ... -00186395/
Best regards
Jörgen Hellberg
http://www.ikea.com/gb/en/products/cook ... -50149560/
http://www.ikea.com/gb/en/products/ligh ... -00328352/
The containers works with leds, the lamp shades are better with flash.
To soften the flash light for the picture of the Oyster: http://www.photomacrography.net/forum/v ... 518#218518 I used this box from IKEA:
http://www.ikea.com/gb/en/products/smal ... -00186395/
Best regards
Jörgen Hellberg
Jörgen Hellberg, my webbsite www.hellberg.photo
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I've used copy paper cut to size taped to the lamp lens and my new favorite is the plain white plastic top of over the counter medicines. They often have an insert in the cap that needs to be removed. If they are taped just right they can easily be flipped up for more direct lighting (and you don't lose them!). Warning some do give a warmer tone but considering IKEA lighting isn't exactly the WB standard it can be corrected in your favorite editing program.